Locking sheave



June 9, 1931.

T. S. OPHEIM LOCKING SHEAVE Filed Oct. 19 1928 NXIE-r; l "BasinsOP'HE'M.

fm which projects for a distance beyondv the` Patented June'9, l1931'romainsv sqornnnrrf,` ormone BEACH, oALiFoanui LooKING sHEAvEApprication filed october 1e, 1928. serial No. 313,624.

invention relates toa sheave adapted to. carry a rope or', cable forsupporting varticles at varyingheights abo-ve the ground or. floorand ismore particularly adapted 'L5 forthe use of cleaners in cleaningcarpets,

vtapestries and the 1 ike,fit having for its prime object theprovisionofV a device of the above character so constructed and arranged asto becapable ofbeinglocked against rotation in one directionso as to hold.the

articles being-@suspended at the desired heightfand having releasingmeans whereby it may be rotatedfin either direction at. the will of theuser. v

Another object is to provide a device of Vthe above characterwhich willbe cheap `and vention it will be understoody that I do knot limit myselfto such preferredform, but Y that various changes and adaptations may bemade therein without departing from the Y spirit of my invention.

In the drawings accompanying and forming a part hereof:

Fig. 1 is a front elevation of a sheavev constructed according to myinvention in, an operatlve posltion.

Fig. 2 is a section on the line 2-2 of.y

Fig. 1. Fig.

of the locking mechanism of my sheave.r

Fig. 4 is a diagrammatic view showing one way of usin my invention.

Referring to t e drawings my device comprises a vsupportingbracket5,'composed oiy the integral cross member or base 6 and the dependingllegs 7 and 8.5 Extending outwardly from each side of the base aboutvcentrallyof its length are ears ,9 vand 1() through which pass thesecuring screws 11l .I by means of which it is securely mountedv upon asupporting beam 12.

The lower ends of the ylegs 7 and 8 terminate in bearings 13 and 14 andin these bearings is mounted a shaft 15,one end of outer kside ofbearing has vse- I I l thefbearings 13 and ,l't'is fa sheaveor-'drum 19provided at each end ywithfthe annular flanges 20-and 21, the flange 21being provided infits'outer periphery with opposed 4notchesor Vteeth 22and 23.. Extending outfwardlyk fromthe inner face of leg 8v immediatelylabove'theflange 211V is-an inverted VL-shaped bracket v24 and`pivotallyI mounted cured thereon a grooved pulley '17 around Y whichypasses the operatingcable or rope :18. 4* Rigid1ymounted upon shaft 15lbetween l 'in this bracket is a locking dog adapted for 1 l engagementwith notches. 22Qand 23fto prevent reverse rotationof thesheave.. ,Thisr.n

locking dog comprises` a kpair of `spaced side members 2.6 and-27rockably mounted upon rthepivot 28Y carried in bracket 24. A-.fpn -ree27 extends through, and connects the?. ends of the members 26 and 27,and this.

`Pin engages the notchesaaer 23; Memberj 27" is longer thanmember 26.vaudits freev Vend is bent toextend inwardlyiashort distance and this'i'nturned end'supports one end 'of a coil spring 29. Loo'selymounted,at

one'end uponfthe pivot 28',.betweenthemem` bers 26 and 27 is. al triggerv30 which extends downwardly on the outer side of theflange21 andvisadapted to be engaged by the pins 31 and 32,.extending outwardly fromthe outer-k face ofsaid flange. Projecting from the edge ofl trigger 30parallel with thefree endof the A y n member 27'ofthe lockin :dogisa'ho'ok 33 y,isan enlarged fragmentary detail upon which is `mountedlt eother endof the coilspring 29. It will-'benoted that 'the' 851V .hook33projects l"out from the edge( of the 'Y triggersuiiiciently so thatwhen said trigger v' is rocked yon the pivot 2,8the end of the coillspring' carried by said hook. will be elevated or lowered `to l changethe .directionA of; .thea pullf thereof from above to lbelow the axis ofsa1d.piv0t, or vice versa,v therebyfrocking the effective "end of thelocking Idog up 35 and36 and one endiof each being ,rigidly securedthereto." lThe free endof thecablef-' vwillbe provided with twocables orropes i l' 36 will extend downwardly and be provided with suitable meansfor detachably engaging the carpet or rug to be cleaned. The free end ofthe cable 35 will extend downwardly and around a grooved wheel 37 andthence over a grooved pulley 38 and downwardly and'will then be likewiseprovided withineans for detachably engagingl the one of the notclies22or 23. As it is dewise direction;

asf

Vreadily understood. 'l

sired to raise thecarpet Vhigher this operation is repeated. `Uien it isdesired to lower the carpet or rug the slieave will be rotated fcounter-clockwise as viewed in Figure 2 until" one ofthe pins 31 or 32engages and rocks the trigger 30 to'inove the locking dog' 'outof'thejpath of the notchesf22 or 23 as "before explained when the rotation ofthe sheave may be reversed.v Reversing the di rection of rotation of thesheave will cause dog to move into the path of the notches. v Thetrigger 30 is journaled on the pin 28 as revious y stated, and isconnected to the Vloc ing dog by means of the spring 29. Clockwise'rotation of the sheave or drum 19 (as shown in Figure 2) will cause thepins 31-.32to en age the trigger, but the trigger beingyielda'le, theywill pass but merely elevating the trigger slightly and causing thelocking dog to press more tightly against the flange 21. YCounter-clockwise rotation of the druinr(as viewed in Figure 2) willcause `the pins B1 or 32 to engage'the trigger 30 before'the'notches2201-23 engage the pin 27. This vwill' swing the trigger to theposiltion shown in dotted lines 1n Figure 3, and

the pull of the spring 29 is altered so that the `ocking dog vswingsinto the dotted line position in Figure 3, which positionis outoilmounted on said stationary support, a pin on the locking dog arranged toengage the notches to prevent rotation of the drum in one direction, atrigger pivotally mounted 0n the stationary support, a springconnectingl said trigger and the locking dog, pins on the flange of thedrum, said pinsV being arranged to engage the trigger and swing thelocking Adog out of the path of the notches when the drum isrotated inone direction, n the opposite direction of rotation of the drum, saidpins engage the trigger to press the locking dog against the flange andmeans to rotate s said drum'.

2. In a device of the character described, including a stationarysupport, a vhanged druin rotatably mounted in said support, one of theflangesof the drum having peripheral notches therein, a bracketextending from the stationary support, a pin extending through thebracket and the support, a locking dog journaled on the pin, a triggerjournaled on the pin, a spring connecting one end of the trigger andvoneend of the locking dog, a pin in 'the'locking dog, said last named pinengaging the notches in the flange to prevent rotation ofthe drum inonedirection, means on the face of the fiange to engage the triggerwhereby the locking dog is swung into or out of engagement with thenotches.

In witness thatI claim the foregoing I have hereunto subscribed mynanie.

. p TORGILS SA OPHEIM.

thef'path of the notches, thus enabling the f druni to4r rotate freelyin the counter-clock- Cloclrwise rotation of the ldrum will causeV thepins 31,l 32 lto swing the locking dog in engaging position as Willbe hebracket 2li is vso arranged'that the locking dog lcannot tilt too 'i farin releasingposition, and the trigger is always' in position to beengaged by the pins Having described iny invention what I claim is: Y 1.In a device of the character'described, including 4a stationary support,"a yiiaiiged drum rotatably mounted in saidsupport, one

Vof theilanges of the drinn having peripheral notches therein, a lockingdog pivotally

